Improvement in rotary printing-machines



2 Sheets-Susan 1.

G. NEWSUM. Rotary Printing-Machine.

Patented March 5, 1878.

INVENTOR WITNESSES MPETERS. FHOTO-LITMOGRAFHEE WASHINGTON. D cv 2 sh68t8$h86t 2. G. NEWSUM. Rotary Printing-Machine.

No. 200,927. Patented March 5,1878.

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FIG 4 WITNESSES 4 I INVENTOR N PETERS. PHOTO-UTHOGRAPHER. WASHXNGTON n G UN-ITEDSTATES. PATENT OFFICE.

GEORGE NEWSUM, OF LEEDS, ENGLAND.

IMPROYEMENT IN ROTARY PRINTING-MACHINES.

Specification forming part of Letters Patent N 0. 200,927, dated March 5,1878; application filed May 14, 1877; patented in England, July 17, 1872.

To all whom it may concern: Be it known that I, GEORGE NEwsuM, of Leeds, in the county of York, England, have invented Improvements in. Rotary Printing- Machines, of which the following is a specification:

This invention relates to that class of presses in which the surface to be printed from is flat, and the same is placed upon a revolving cylinder or carrier, and the impression-roller is brought toward the printing-surface by a cam.

My invention relates to the construction of the cylinder or carrier, and the means for producing the proper pressure upon the printingsurface.

The invention will be best understood by reference to the accompanying drawings, in which Figure 1 is a side elevation. Fig. 2 is a longitudinal section through stone or type carrier. Fig. 3 is'a section of stone or type carrier, and Fig. 4: is a sectional plan.

a is the type-carrier, of a cam form instead of cylindrical, having two sides flat, as shown at b. In the flat sides I) may be fitted adjustable beds c, (which are held in position in the carriers by the set-screws 11,) on which the type is secured in any required position. The type may be adjusted laterally by means of setscrews, wedges, or their equivalents. The adjustable beds 0 are raised or lowered by means of the wedges 0, (shown in Figs. 2 and 3,) to suit the varying thicknesses of type. The setscrews f are used to I actuate the wedges e, which are all connected together by means of the castings or saddles g. The bosses h in the saddles g serve as nuts, into which the setscrews f work. It will be readily understood that by the movement of the saddles g the wedges may be moved backward or forward simultaneously. These, working against inclines '13 on the adjustable beds a, cause the beds to be raised or lowered at pleasure by the attendant. When preferred, the beds 0 are not made adjustable.

The type-carrier a is also provided with two distributing-surfaces, k and l. I mount the type-carrier a on the shaft j in suitable bearings in the frame-work, as shown. On each end of this carrier at a cam-shaped wheel, m, is provided, which is of the same form as the stone or type carrier. On the same frame-work, and in adjustable bearings 19, I provide another shaft, g, on which is mounted the griper-cylinder n, of ordinary construction, as shown. On the griper-cylinder shaft q I mount a fast spur-wheel, 0, which is circular, and made to gear into the cam spur-wheel m on the typecarrier shaft J. The type-carrier a and the griper-cylinder n are so arranged or geared that the latter makes two revolutions to the formers one. I

In order to separate the griper-cylinder n from the type-carrier, for the purpose of preventing the impression being taken on the sheet in case of the sheet being improperly fed or placed on the gripper-cylinder n, I make the shaft hollow, and mount it in internal eccentric bushes 1". These two bushes are connected or coupled together by means of a rod, 8, which passes through the hollow gripercylinder shaft q. These bushes 1" are pinned 'or otherwise fastened to the rod 8, as shown.

On one or both ends of the rod 3 is provided a hand-lever, t. It will be readily understood that by turning the rod by means of the lever or levers t the internal eccentric bushes r are caused to move round simultaneously, whereby the griper-cylinder n is separated or brought up to the type-carrier when required.

The gripercylinder, when working, runs against a surface prepared for it on the typecarrier (1. This surface to is of the same dimensions as the pitch-line of the rack-wheel m. The internal bushes r of the griper-shaft q are provided with external bushes 12, mounted in sliding bearings 10, being so arranged that the griper-cylinder may be drawn in close contact with the type-carrier a. In order to do this, 1 couple suitable slide-bars w to the external bushes t of the griper-cylinder shaft q. These bushes are provided with adjustable hearings, in which the springs to are placed. These act as cushions for the bushes v of the griper-cylinder. On each side of bar to a roller, 1, is mounted, and made to work in the recessed cams 2=at each end of the type-carrier a. As the latter rotates the rollers 1, work ing in the cams 2, retain the various rotating parts in their required position with regard to each otheras, for instance, the fast spurwheel 0 is retained at its proper distance from the cam-wheel m.

The inking-rollers 3 and ductors 4 are caused to revolve in the ordinary way, and, by means of suitable projections fixed on the typecarrier on, the rollers 3 for one color are lifted clear of the other rollers.

Motion is given to the type-carriers a from some suitable motive power through drivingpulleys 5 and gearing 6, thence to the gripercylinder through the cam spur-wheel m and fast spur-wheel o, and the required motion is imparted simultaneously, through cams and frictionpulleys, to the damping and inking rollers.

Letters Patent in Great Britain for this invention were granted July 17,1872, No. 2,139.

Having now described the nature of my said GEORGE NEWSUM.

Witnesses J. W. HARDING, WM.FA1RBURN HART. 

